Queen Creek, AZ Accessory Structures: ADU Rules (2026)

A, governs ADUs on single-family residential lots only. An ADU can carry a partial or full kitchen but never more than one kitchen, must have its own separate entrance independent from the primary residence, must comply with all applicable building code requirements, and cannot be a mobile home, RV, trailer or other movable structure. It must be permanently affixed to a foundation and served with its own water, sewer and electric utilities. Only one attached ADU or one detached ADU is allowed per single-family lot, and no additional parking spaces are required for it.

Front setbacks must match the primary residence's setback for the underlying zoning district, side and rear setbacks need only five feet, and the ADU's height is capped at whatever the primary residence's height limit is for that district. Its design, exterior materials, colors and roof pitch do not have to match the primary home. Size is capped at 75 percent of the primary residence's interior habitable area or 1,000 square feet, whichever is less, though an owner can seek a larger single ADU, up to 50 percent of the primary residence's total square footage including garages, porches and patios, if it matches every setback and design requirement of the primary home.

Once Queen Creek's population passes seventy-five thousand under the Arizona statutory population definition, a lot of at least one acre can add a second detached ADU alongside the first, provided one of the two is deed-restricted as affordable housing rented to households earning up to 80 percent of area median income, with that deed restriction recorded with the County Recorder.